Sensitivity of Regular Estimators

Sensitivity of Regular Estimators
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常规估计器的灵敏度

DOI:
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发表时间:
2018
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影响因子:
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通讯作者:
Yaroslav Mukhin
Yaroslav Mukhin
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文献类型:
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作者:
Yaroslav Mukhin

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本文研究了两个标量估计的局部渐近关系。我们将目标估计对控制估计的灵敏度定义为目标泛函相对于控制泛函的梯度方向的方向导数。根据模型流形上的信息度量的灵敏度是正则有效估计的渐近协方差。根据一般政策度量的模型流形上的灵敏度可以从定期有效估计的影响函数。政策敏感性有一个局部的反事实解释,在其他条件不变的情况下,反事实分布的变化是由控制参数和模型流形上的黎曼度量的组合指定的。
This paper studies local asymptotic relationship between two scalar estimates. We define sensitivity of a target estimate to a control estimate to be the directional derivative of the target functional with respect to the gradient direction of the control functional. Sensitivity according to the information metric on the model manifold is the asymptotic covariance of regular efficient estimators. Sensitivity according to a general policy metric on the model manifold can be obtained from influence functions of regular efficient estimators. Policy sensitivity has a local counterfactual interpretation, where the ceteris paribus change to a counterfactual distribution is specified by the combination of a control parameter and a Riemannian metric on the model manifold.